Join astronaut Chris Hadfield - a YouTube sensation for his performance of David Bowie’s “Space Oddity” aboard the International Space Station - along with hitchhikers Michio Kaku (and others) on a joyride across our Solar System, scaled down to the size of the continental United States.

On July 20th, 1969, the history of space exploration would forever be changed as two men left their boot prints on our moon's surface. This remarkable feat would be the culmination of decades of research, sacrifice, and innovation. How did we get there?

Discovered by an unlikely team of amateur historians 45 feet beneath a Kansas cornfield, the Steamboat Arabia is one of the best-preserved shipwrecks in American history. The treasures contained within painting a vivid picture of western expansion and the treacherous frontier.

An alarming decline in insect populations could devastate all life on earth. What's causing it, and can anything be done to stop it?

The North Atlantic Right Whale is on the verge of extinction. The leading cause of death and injury to the whales is from ship strikes or entanglement in fishing lines. In this Breakthrough episode, we will hear from the leading experts and biologists who are racing to save this species.

How do you decide nature's weirdest animal? Is it the sloth, that hangs upside down and moves so slowly that moss grows in its fur? Is it a sea pen that sits rooted to the seabed in endless darkness and emitting its own glow?

From the arctic tundra to the great planes, the kingdom of the wolf extends across the entire northern hemisphere. They are icons of the wilderness, spectacular creatures that live and die by the sword.

NPR’s Peter Sagal takes us on an irreverent romp through American history to reveal how money makes the world go around.

Journey around the globe as some of the best up-and-coming wildlife filmmakers take you on a locals-only tour of their home countries.

To survive Mars, our species will need to evolve how we eat, drink, and build our homes. Will we need our genes to evolve as well?